Expansion valve



FIG. 1 is a front perspective view of an expansion valve showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a left side elevational view thereof; the right side elevational view being a mirror image thereof.

The broken lines shown in the figures are included for the purpose of illustrating portions of the expansion valve and form no part of the claimed design. 

CLAIM The ornamental design for an expansion valve, as shown and described. 